Sub-90 fs dissipative-soliton Erbium-doped fiber lasers operating at 1.6 μm band

We present an L-band dissipative soliton (DS) fiber laser, which can deliver 87.5 fs pulses at 1.6 mu m band. Numerical simulations are used to confirm the DS generation, and prove the pivotal component of the invisible filter with proper bandwidth in the formation of DS pulses. Such a robust, compact ultrafast laser source with higher pulse energy is hence an excellent seed source for L-band amplifiers. The mechanism revealed in the simulations is helpful to develop a unified theory for understanding various mode-locking regimes in normal dispersion lasers. (C) 2016 Optical Society of America